{"id":"CVE-2024-38518","aliases":["EUVD-2024-37388","GHSA-4m48-49h7-f3c4"],"status":"published","title":"bbb-web API additional parameters considered","description":"BigBlueButton is an open-source virtual classroom designed to help teachers teach and learners learn. An attacker with a valid join link to a meeting can trick BigBlueButton into generating a signed join link with additional parameters. One of those parameters may be \"role=moderator\", allowing an attacker to join a meeting as moderator using a join link that was originally created for viewer access. This vulnerability has been patched in version(s) 2.6.18, 2.7.8 and 3.0.0-alpha.7.","severity":{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00307,"percentile":0.23756,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-284"],"published":"2024-06-28T20:25:40Z","modified":"2026-10-28T02:30:50Z","products":[{"vendor":"bigbluebutton","product":"bigbluebutton"}],"references":[{"url":"https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-4m48-49h7-f3c4","tags":["x_refsource_CONFIRM","x_transferred","advisory"]},{"url":"https://github.com/bigbluebutton/bigbluebutton/pull/20279","tags":["x_refsource_MISC","x_transferred","fix"]},{"url":"https://github.com/bigbluebutton/bigbluebutton/commit/a9d436accdcd26ea66bed9f391488ac128cd62d1","tags":["x_refsource_MISC","x_transferred","fix"]},{"url":"https://github.com/bigbluebutton/bigbluebutton/commit/ea6e9461dceae8fa593543d8c686f77bb8677e72","tags":["x_refsource_MISC","x_transferred","fix"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/38xxx/CVE-2024-38518.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-38518","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2024-38518","title":"bbb-web API additional parameters considered","description":"BigBlueButton is an open-source virtual classroom designed to help teachers teach and learners learn. An attacker with a valid join link to a meeting can trick BigBlueButton into generating a signed join link with additional parameters. One of those parameters may be \"role=moderator\", allowing an attacker to join a meeting as moderator using a join link that was originally created for viewer access. This vulnerability has been patched in version(s) 2.6.18, 2.7.8 and 3.0.0-alpha.7.","status":"published","published":"2024-06-28T20:25:40.743Z","modified":"2024-08-02T04:12:25.127Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:34:16.367792Z"}],"euvd":[{"id":"EUVD-2024-37388","description":"BigBlueButton is an open-source virtual classroom designed to help teachers teach and learners learn. An attacker with a valid join link to a meeting can trick BigBlueButton into generating a signed join link with additional parameters. One of those parameters may be \"role=moderator\", allowing an attacker to join a meeting as moderator using a join link that was originally created for viewer access. This vulnerability has been patched in version(s) 2.6.18, 2.7.8 and 3.0.0-alpha.7.","status":"published","published":"2024-06-28T20:25:40Z","modified":"2024-08-02T04:12:25Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L","level":"medium"}],"updated_at":"2026-11-03T03:50:18.462935Z"}],"nvd":[{"id":"CVE-2024-38518","description":"BigBlueButton is an open-source virtual classroom designed to help teachers teach and learners learn. An attacker with a valid join link to a meeting can trick BigBlueButton into generating a signed join link with additional parameters. One of those parameters may be \"role=moderator\", allowing an attacker to join a meeting as moderator using a join link that was originally created for viewer access. This vulnerability has been patched in version(s) 2.6.18, 2.7.8 and 3.0.0-alpha.7.","status":"published","published":"2024-06-28T21:15:03.18Z","modified":"2026-06-17T07:40:27.477Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:10:09.388795Z"}],"osv":[{"id":"CVE-2024-38518","title":"bbb-web API additional parameters considered","description":"BigBlueButton is an open-source virtual classroom designed to help teachers teach and learners learn. An attacker with a valid join link to a meeting can trick BigBlueButton into generating a signed join link with additional parameters. One of those parameters may be \"role=moderator\", allowing an attacker to join a meeting as moderator using a join link that was originally created for viewer access. This vulnerability has been patched in version(s) 2.6.18, 2.7.8 and 3.0.0-alpha.7.","status":"published","published":"2024-06-28T20:25:40.743Z","modified":"2026-10-28T02:30:50.720826525Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L","level":"medium"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T15:44:41.133403Z"}]}}